// min_sec.c -- converts seconds to minutes and seconds
#include <stdio.h>
#define SEC_PER_MIN 60 // seconds in a minute
int main(void) {
  int sec, min, left;
  printf("Convert seconds to minutes and seconds!\n");
  printf("Enter the number of seconds (<=0 to quit):\n");
  scanf("%d", &sec); // read number of seconds
  while (sec > 0) {
    min = sec / SEC_PER_MIN;  // truncated number of minutes
    left = sec % SEC_PER_MIN; // number of seconds left over
    printf("%d seconds is %d minutes, %d seconds.\n", sec, min, left);
    printf("Enter next value (<=0 to quit):\n");
    scanf("%d", &sec);
  }
  printf("Done!\n");
  return 0;
}
